| Fully Coupled Fluid-Structure Interaction Model Based on Distributed Lagrange Multiplier/Fictitious Domain Method |
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| 作者姓名： | 及春宁 董晓强 赵冲久 王元战 |
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| 作者单位： | School of Civil Engineering Tianjin University，College of Architecture and Civil Engineering，Taiyuan University of Technology，Laboratory of Coastal Engineering Structures，Tianjin Research Institute of Water Transport Engineering，School of Civil Engineering，Tianjin University，Tianjin 300072，China，Taiyuan 030024，China，Tanggu 300456，China，Tianjin 300072，China |
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| 基金项目： | This study is supported by the National Natural Science Foundation of China （Grant No. 50579046） and the Science Foundation of Tianjin Municipal Commission of Science and Technology （Grant No. 043114711 ） |
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| 摘 要： | This paper,with a finite element method,studies the interaction of a coupled incompressible fluid-rigid structure system with a free surface subjected to external wave excitations.With this fully coupled model,the rigid structure is taken as "fictitious" fluid with zero strain rate.Both fluid and structure are described by velocity and pressure.The whole domain,including fluid region and structure region,is modeled by the incompressible Navier-Stokes equations which are discretized with fixed Eulerian mesh.However,to keep the structure's rigid body shape and behavior,a rigid body constraint is enforced on the "fictitious" fluid domain by use of the Distributed Lagrange Multiplier/Fictitious Domain(DLM/FD) method which is originally introduced to solve particulate flow problems by Glowinski et al.For the verification of the model presented herein,a 2D numerical wave tank is established to simulate small amplitude wave propagations,and then numerical results are compared with analytical solutions.Finally,a 2D example of fluid-structure interaction under wave dynamic forces provides convincing evidences for the method excellent solution quality and fidelity.
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| 关 键 词： | 流体-结构相互作用 全耦合模型 分布式拉格朗日乘数/假域法 数字造波水池 |
| 修稿时间： | 2006-10-19 |
Fully Coupled Fluid-Structure Interaction Model Based on Distributed Lagrange Multiplier/Fictitious Domain Method |
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| JI Chun-ning,DONG Xiao-qiang,ZHAO Chong-jiu,WANG Yuan-zhan.Fully Coupled Fluid-Structure Interaction Model Based on Distributed Lagrange Multiplier/Fictitious Domain Method[J].China Ocean Engineering,2007,21(3):439-450. |
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| Authors: | JI Chun-ning DONG Xiao-qiang ZHAO Chong-jiu WANG Yuan-zhan |
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| Institution: | 1. School of Civil Engineering, Tianjin University, Tianjin 300072, China ;2. College of Architecture and Civil Engineering, Taiyuan University of Technology, Taiyuan 030024, China;3. Laboratory of Coastal Engineering Structures, Tianjin Research Institute of Water Transport Engineering, Tanggu 300456, China |
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| Abstract: | This paper,with a finite element method,studies the interaction of a coupled incompressible fluid-rigid structure system with a free surface subjected to external wave excitations.With this fully coupled model,the rigid structure is taken as "fictitious" fluid with zero strain rate.Both fluid and structure are described by velocity and pressure.The whole domain,including fluid region and structure region,is modeled by the incompressible Navier-Stokes equations which are discretized with fixed Eulerian mesh.However,to keep the structure's rigid body shape and behavior,a rigid body constraint is enforced on the "fictitious" fluid domain by use of the Distributed Lagrange Multiplier/Fictitious Domain(DLM/FD) method which is originally introduced to solve particulate flow problems by Glowinski et al.For the verification of the model presented herein,a 2D numerical wave tank is established to simulate small amplitude wave propagations,and then numerical results are compared with analytical solutions.Finally,a 2D example of fluid-structure interaction under wave dynamic forces provides convincing evidences for the method excellent solution quality and fidelity. |
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| Keywords: | fluid-structure interaction fully coupled model distributed Lagrange multiplier/fictitious domain method numerical wave tank |
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